Move fields via document level

Hi,

I've attached a link to a pdf indicating how I want my code to work. Dropbox - moveFields.pdf

Basically the operator has 2 options to move fields one way or another obscuring or showing gaps.

I basically want my code to be at the document level but keep hitting a brick wall?

There are 2 sizes of fields, the code for fields named 'Gap' is working at the document level but the code for fields named 'test' won't work for me at the document level? I've had to put the script in the calculate window for each 'test' field.

Any suggestion would be gratefully received